Economizer



10, 1931- A. c. SCHLEH 92,327

ECONOMIZER Filed Jan. 27, 1928 2 Sheets-Sheet l 30\ I ir 42 .J

[22 [7 C p/1m filerf C. Schleiz I 35 the economizer.

Patented Feb. 10, 1931 our we I .ALBERr scHLEHQor s r. raun-ilrrmxrnsorzi Application riled. 'J'anuaryL27, i928. fseriarno. 249,868.

My invention relates to -economizersiand partlcu larly to devlces of this nature adapted tobe installed in the smoke pipe of boilers, furnaces or other heating plantsfor utilizing of heat ordinarily lost in the exhaust gases of said heating plants, and has for its object to provide a device whereby the heat ordinarilywasted in the exhaust gases of such heating plants may be utilized for useful purno poses without appreciably affecting the draft in the heating plant.

An ob 'ect of the invention resides in pro- Vidingan elongated casing having upper and lower partitions therein spaced from-the top and-bottom of said casing to form upper and lower compartments and in inter-connecting .said upper and lower partitions with a series of circular fiues arranged in a row n said casing and communicating withsaid upper and lower compartments and in providing said upper and lower compartments with a iwarmair outlet and a cold air inlet respec .tively. i I I I II V Another object resides in surroundingsaid flues with a jacket extending from the upper partition to within a short distance of the lower partition and following the curvature of said fines to form a tortuous passageway extending around the same and to fur- .ther providean exhaust gas inlet and an exhaust ne outlet ,communicat n with said O 1 passageway adapted to be inserted in tne smoke pipe for conducting the exhaust'gases from thefurnaceor heatin lant throu h A. feature of the ling'the two central fines and 1nsert1ngtherebetween a vertical wall'and in further ar-,

plan sectional view, t ken and outlet.

invention resides in spac through the I center. of the exhaust gas inlet Fig. 2 is an elevational'section'al view taken on line 2-2 of Fig. 1. I I

Fig. 3 is a vertical sectional view taken on I line 33 of Fig. 1. I 1 r f i In ordinary residential heating plants an appreciable quantity of heat is lost due to the temperature of the exhaust gasesfrom the heating plant in leaving the same. invention provides a simple and effective means 7 whereby this excess temperature may beutilized to heat the interior of the building-so that when the exhaustgases are finally expelled into the chimney the same'are at i a relatively low; temperature.

My inventionproper consistsof a casing A formed with side walls 10 and 11 andgend' walls 12 and 13. These walls are connected by means of a hopper-shapedtop 14 and a hopper shaped bottom 15. Withinthe Lcasing is disposed anupper partition 16 and. a lower partition 17 which are spacedfrom the top 14 and bottom 15 to form upper and lower compartments 18 and 19. Between these partitionsare arranged a row of circular flues 20, 21 22,23, 24 and 25, which flueslinterconnect said partitions 16 and 17 and communicats with the compartments 18 and19. Within each of these fines is arranged anumber of a. radial inwardly extending fins 20 which .are

preferably constructed of copper or some other suitable heat conducting material and which aidin conducting heat from the exterior of said iiuesto theair passing upwardly through thesame. ,At the lower enjdjof the casing A is provided an airinlet 121 to which the cold air pipe 122 may be attached, which is adapted to conduct cold air into the lower compartment 19.

on legs 1.23 which serves to distribute the incoming cold air so that'the same passes equally through the varius flues 20, 21, 22, 23, 2e and 25. At the upper end'ofthecasing A isdisposed awarm air outlet 12% which has connected to it a warm air pipe 125. This outlet communicates with the compartment 18 and serves to conduct away theair heated by-the economizer. I i

Immediately above this nletis provided a baffle or deflector 231 'sup ported other while the remaining dues are relatively close to one another, and that the fines are ar-.

ranged in a single row in substantial alignment. Between the two flues 22 and 23 is arranged a vertical wall 26 wl ich extends from one flue to the other and reaches from the partition 16 to the partition 17. Strips of metal 27 are connected between the remaining fines and extend from the partition 16 to within a short distance of the lower partition 17 and serve the same purpose as the wall 26.

By means of these strips of metal,'-p artition 26 and'the various flues the interior of the case A is substantially divided in two parts. \Vithin casin A is arranged a jacket 28 which Surrounds thevarious lines 20 to 25' and is of said fines to provide a narrow tortuous pa ssageway 29 extending completely about the same. This jacket extends up to the upper partition 16 but falls short of the lower partition 17, leaving an open space 30 bringing said passageway or chamber into communication with the interior of the casing A. At the uppermost portion thereof the jacket 28 is connected on opposite sides of the wall 26 with an exhaust gas inlet 31 and an exhaust 'gas outlet 32 which pass through the two walls and 11 of said casing. I The inlet and outlet are adapted to be connected to pipes 33 and 3a which form a portion of the smoke pipe of the furnace or other heating plant with which the invention is installed. The inlet 31 communicates with the passageway 29 so that the exhaust gas from the .heating'plant upon entering said inlet strikes the wall 26 and divides passing equally to the right and left through the passageway 29 and unites on the opposite side of said wall, leaving the device through the outlet 32. During such passage through the economizerthe heat in the exhaust gas is absorbed by the walls of the fines to and conducted to the air passing through theinterior of the same. It is to be noted that during the passage of the exhaust gases through the economizer that the same does not change itselevation so that the draft of the heating plant remains practically unaffected, while the waste heat in'the exhaust gases may be readily made use of. In the construction of the jacket 28 the same may be brought toward the walls 'lO-and 11 as shown in Fig. 1 and the inlet and outlet 31 and :32 formed directly in said walls 10 and 11. With this construction the exhaust gas'most' easily enters the passageway 29 due to the curvature of the said jacket indicated at 35. If desired, however, the said jacket may be extended tangentially across the two fines 22 and 23, and the inlet 31 and outlet 32 connected directly through the same. In either event the construction provides two chambers 36 and 37 with which the inlet 31 and outlet 32 communicate. r

In the wall 26 is arranged'an opening 38 which is in substantial alignment with inlet a 31 andoutlet 32. Thisopening is normally closed by means of a closure 39 disposed within chamber 37 and hingedly connected to said wall-26 as indicated at 40." A counter-weight 41 attached to the lower portion of this closure serves to hold the same in a position to normally closethe opening 38. This closure serves as a relief valve in the event that the pressure within the chamber 36 becomes too great. In such event the pressure within said chamber hfts the closure 39 from closing position allowing the gas to escape through the1wall26 and directly into the outlet 32. In

the event that the amount of gas generated by the heating plant is too great to be comfortably handled by the passageway 29, said passageway being open as indicated by permits the excess portion of the exhaust gas to escape into the interior of casing A where the same may bypass said passageway and enter the exhaust chamber 37 andbe'removed from the economizer. In this manner my economizer will function equally as well whether installed on small or large heating plants within suitable limits and will function equally as well with any kind of fuel.

For the purpose ofcleaning the interior of the casing A I-arrange two hand holes 42 and 43 at the lower portion of the end wall 12 of said casing A by means of which a brush may be inserted into the same for removing the soot or other deposit accumulating therein. These hand holes may be closed by suitable covers 44 so that when the device is in operation thecasing is completely sealed frompreferable the pipe 22 may be connected with one or more of the registers in the rooms of the building to be heated or the heat utilized for any other desired purpose."

My invention is highly advantageous in that it provides a simple and efiective device for utilizing the waste heat ordinarily expelled with the exhaust gases of a heating plant. The device so functions as to offer a minimum resistance to the passage of the air to be heated and to the exhaust gases, thereby giving a maximum capacity and practically having no effect upon the draft of the heating plant. The device is fully automatic taking care of excess exhaust gases as well as unusual pressure occurring inthe 1 4 CZY,

smoke pipe. 7 The device may be readily cleaned and there are no t ricate parts to get out of order in the operation-of the same. The economizer-may be constructed almost entirely of sheet iron so that the same may be built at a nominal cost.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I protect by Letters '1; An economizer comprising a casing,

- spaced partitions at the upper and lower portion of said casing forming upper and lower compartments, a ser es of flues intercoiinecting said partitions and communicatupper compartment, a jacket surrouncing said fines and spaced therefrom and forming a passageway thereabout, an inlet to said passageway,

an outlet to said passageway, said jacket extending up to the upper partitions to form said passageway closed at the upper end, said jacket being spaced from the lower partition to form said passageway open at its lower endto permit of bypassing aportion of the exhaust gas froinsaid passageway. i 7

2. An economizer comprising a casing, spaced partitions atthe upper and lower portion of said casing forming upper and lower compartments, a series of fines interconnecting said partitions and communicating with said compartments, a cold air inlet communicating with said lower compartment, a warm air outlet communicating with said upper compartment, two of said fines being spaced from one another, a vertical wall connecting said flues, a jacket surrounding said flues on both sides thereof and disposed within said casing and forming a passageway thereabout, an exhaust gas inlet communicating with said passageway on one side of said wall and an exhaust gas outlet communicating with said passageway on the other side of said wall and substantially opposite to said inlet and a valve disposed within said wall for permitting exhaust gases to flow through said passageway or directly through said wall from'said inlet to said outlet. r

3. An economizer comprising a casing, spaced partitions at the upper and lower portionof said casing forming. upper and lower compartments, a series of fines interconnecting said partitions and communicating with said compartments, a cold air inlet communicating with said lower compartment, a warm air outlet communicating with said upper compartment, a jacket surrounding said fines and spaced therefrom and forming complicated or in ing with said compartments, a cold air inlet 4. communicating with saidlower compartment,

a warm air outlet communicating with said charging into. said outlet.

aipassagew'ay, thereabout, an inlet to said pas "extending up tothe upper partitionsito form i said passageway closedat 'the'upper end and being spaced from the lower partition to foringsaidrpassageway open at its lower end to permit ofbypassnig a portionof the exhaust gas around said passageway, said ex haustgas inletandoutlet-being disposed near the upper'portion of said passageway,

' 4'. .An econom zer comprisingan elongated casing, spaced partitions at the. upper and lowerportion thereof forming upper and lower coin artinentswithin saidcasin ,a t), 7

row of circular flues interconnecting said partitions and-communicating with said upper and lower:compartments,' an' air inlet con-' nected with said lower compartmenaan air outlet connected 1with said upper. compartment, the two flues at the center being spaced apart, .a wall positioned between said fines and partitions, a jacket surrounding: said fines andspaced therefrom and conforming to the curvature of said fiues toform a circuitous. passageway extending about said fines, said jacketextendingup to said upperpartition and being spaced from said lower partitionto permit of the escape of surplus exhaust gases from said passageway and an inletand outlet to said passageway for conducting exhaust gases thereto and therefrom.

5.- An economizer comprising a'casing, a series of upwardly extending conduitsiwithin said casing for conducting the fluid to be heated through'said casing, and acketsurroundingsaid conduits and forming in conjunction, therewith a continuous passageway substantially horizontal throughout-its ex.- tent for conductingthe heating fluid aboutsaid conduits;

6. An economizer comprising a casing, a series of upwardly extendingconduits within said casing for conducting the fluid tobe heated through said casing, means forming in conjunction with said conduits a circuitous passageway for conducting the heating fluid about said conduits, an inlet to said vpassageway and an outlettherefor, said inletand outlet being positioned in close proximity to one another, and a valve between said inlet in said casing for. conducting the fluid to be heated through said casing, means forming n con unction withsaid conduits a circuitous passageway for conducting the heatingfiuid about said conduits, an inlet to saidpassageway, an outlet therefor, and a valvein said passageway situated near saidjinlet and dis I 8. An economizer comprising a casin d 1 i H37 series of upwardly extending conduits within said casing for conducting the fluidto be p f heated through said casing,means forming in conjunction with saidconduits a circuitous passageway for conducting the heating fluid about said conduits, an inlet to said passageway, anoutlet theretonsaid iniet andoutlet being in substantial alignment, and a relief valve for said passageway'situated between said inlet and outlet and in substantial al gnment therewith. 7 v

9. An econonnzer comprlsmg a casing, a series ot upwardly entendlng conduits :w1th- I in said casing for conducting the fluid to be heated through said casing, means forming chamber about said conduits, a. acket disposed within sald chamber and forming in conjunction with said conduits a passageway for conducting the heat ng flmdabout said conduits, said passageway communicating with said chambert a a 10. An economizer comprising acasing, a series of upwardly extending conduits within said casing for conducting the fluid to be heated through said casing, a jacket surrounding said conduits and forming in conjunction therewith a. tortuous passageway for conducting the heating fluid about said conduits, andmeans forming a free passage way for the heating fluid coextensive with said tortuous passageway, said passageways being in communication. I V

11. Aneconomizer comprising a casing, a series of upwardly extending conduits within said casing for conducting the fluid to be heated through said casing, a jacket surrounding said conduits and forming in conjunction therewith a: tortuous passageway for conducting the heating fluid about said conduits, and means forming a free passageway for the heating fluid coextensive with said tortuous passageway, said passageways being in communication throughout their extent. 7 o

'12. An economizer comprising a casing, a series of upwardly extending flues within said casing for conducting the'fluid to be heated through said casing, two of said flues being spaced from one another, a jacket surrounding said casing and forming in conjunction therewith a passageway for conducting the heated fluid about said flues, a wall positioned between said spaced flues, an inlet pipe communicating with said passageway on one side of said wall, an outlet pipe. communicating with said passageway on the other side of said wall, said wall having an opening therein adapted to bring said outlet into communication with said inlet, a

closure for said opening hingedly connected to said wall at the upper portion thereof, and means for yieldingly supporting said closure in closing position.

y In testimony whereof l have affixed my signature to this specification.

ALBERT C. SCHLEH. 

